Re: [PSUBS-MAILIST] Seals again

["Captain Nemo" <vulcania@interpac.net>]

Gentlemen,

Regardless of whether the particular motor/prop design imparts only the
additional depth pressure acting on the end surface of the shaft, or the
entire prop hub, to the thrust bearing; additional stress (beyond that which
Minn Kota intended) will be imparted to the motor's various components
(including the electrical coupler and housing nosecone O-ring, which the
present "double shaft-seal idea" doesn't consider) by non-compensated depth
pressure, resulting in adverse effects which are best avoided.  Pressure
compensation solves all these problems.

System redundancy has long been a universally accepted concept in submarine
design; to argue otherwise is ignorant.

Pressure compensation is a proven safe and reliable means of reducing motor
wear while increasing motor functionality and seal integrity.   There is no
need to reinvent the wheel.

The open door policy of this website allows the uninitiated to expound all
sorts of ideas to the submarine community.  Consider the source.

Regarding the present thread: encouraging others to forego long-established
and well-proven methods is as irresponsible as sport-jumping out of an
airplane from 12,500 feet AGL with only one parachute.  Feel free to do it,
but don't advise others that it is safe to do the same.

Very best regards,

Pat Regan
vulcania@interpac.net